The Twenty-Five Longchens (spaces of the universe) represent the dimensionof the wisdom of Samantabhadra and of the way this wisdom manifests in all sentient beings. Like the Song of the Vajra, these mantras are very important for the practice and for integrating knowledge of our real condition. therefore pratitioners of Dzogchen use them above all for contemplation and for realization. This MP3 CD contains the teachings Chogyal Namkhai Norbu gave related to the terma of Changchub Dorje in Barcelona, Spain October 2005. A recording of Adriano Clemente performing the practice alone is also included.